| English thesaurus | |||
| |||
| STEP | |||
|
Shell : 388 phrases in 32 subjects |
| American usage, not spelling | 4 |
| Archaeology | 2 |
| Archiving | 1 |
| Astronautics | 10 |
| Automobiles | 1 |
| Aviation | 4 |
| Chemistry | 15 |
| Computers | 2 |
| Construction | 13 |
| Figurative | 3 |
| Finances | 8 |
| General | 100 |
| Geology | 1 |
| Informal | 5 |
| Information technology | 16 |
| Law | 3 |
| Mechanic engineering | 2 |
| Medical | 1 |
| Metallurgy | 2 |
| Microelectronics | 1 |
| Microsoft | 2 |
| Military | 132 |
| Nautical | 4 |
| Oil and gas | 26 |
| Physics | 1 |
| Proverb | 2 |
| Space | 1 |
| Technology | 15 |
| Transport | 1 |
| Weapons and gunsmithing | 4 |
| Wind Energy | 1 |
| Zoology | 5 |